By default, WordPress will save an auto-draft for you, and will update it every 60 seconds. If that’s too frequent, or not enough you can update it.
Save every 15 seconds
define('AUTOSAVE_INTERVAL', 15);
Save every 5 minutes
define('AUTOSAVE_INTERVAL', 60*5);
If you’re working on a theme, you might want to set some default background values for your users, it’s easy to do so without changing it permanently.
define('BACKGROUND_IMAGE', 'http://colorto.me/png/20/rand/rand');
define('BACKGROUND_COLOR', 'a90');
Inspired by this tweet.
Add a little bit of fancy to your edit link in the Admin Bar with this:
add_action( 'wp_before_admin_bar_render', 'adminbar_tweaks');
function adminbar_tweaks() {
global $wp_admin_bar;
if (isset( $wp_admin_bar->menu->edit['title'] ) ) {
$title = $wp_admin_bar->menu->edit['title'];
if ( substr( $title, 0, 5 ) == 'Edit ' ) {
$hand = '<span style="font-size:20px;margin:-1px 3px 0 0;float:left;">✍</span>';
$wp_admin_bar->menu->edit['title'] = $hand.$title;
}
}
}
If you’ve already started poking around in WordPress 3.2, you may have noticed that the privacy notice that used to appear in the WordPress header has been moved to the Right Now box on the dashboard.
And if you’re like me, you probably wish it was back at the top. Fortunately, with just a few lines, we can do that:
add_action('in_admin_header', 'privacy_notice_in_header');
function privacy_notice_in_header() {
if (1 != get_option('blog_public')) {
$title = apply_filters('privacy_on_link_title', __('Your site is asking search engines not to index its content') );
$content = apply_filters('privacy_on_link_text', __('Search Engines Blocked') );
echo "<p class='alignleft' style='padding:9px 0 0;margin:0;'><a href='options-privacy.php' title='$title'>$content</a></p>";
}
}
Be careful when using this, as users may not expect this functionality.
If there’s only one match for a particular search query, you can save users the hassle of clicking by simply redirecting them to the page/post.
add_action('template_redirect', 'single_result');
function single_result() {
if (is_search()) {
global $wp_query;
if ( $wp_query->post_count == 1 && $wp_query->max_num_pages == 1 ) {
wp_redirect( get_permalink( $wp_query->posts[0]->ID ) );
exit;
}
}
}
You probably shouldn’t use this if you have really generic page/post titles, but it can be a really handy feature.
Basically, if a user searches for something that happens to be an exact match to a page or post you have, it’ll redirect the user to the page, rather than displaying search results.
add_action('template_redirect', 'seach_query_is_title');
function seach_query_is_title() {
if (is_search()) {
global $wp_query;
if ( get_page_by_title( get_search_query(), 'OBJECT', 'post' ) ) {
wp_redirect( get_permalink( get_page_by_title (get_search_query() )->ID ) );
}
elseif ( get_page_by_title( get_search_query(), 'OBJECT', 'page' ) ) {
wp_redirect( get_permalink( get_page_by_title( get_search_query() )->ID ) );
}
}
}
If you have a WordPress Network and you use the My Sites menu a lot, you might wish the list was sorted alphabetically, rather than by site ID.
Here’s how you can reorder that list
add_action('admin_bar_menu', 'reorder_my_sites');
function reorder_my_sites( $wp_admin_bar ) {
//get "my sites"
$mysites = $wp_admin_bar->user->{'blogs'};
//and remove the unsorted list
unset( $wp_admin_bar->user->{'blogs'} );
//loop thru mysites to get id and title
$pairs = array();
foreach($mysites as $id => $info) {
$pairs[$id] = strip_tags($info->blogname);
}
$pairs = array_map( 'strtoupper', $pairs );
//sort by title, keep id
asort($pairs);
//loop thru sorted sites, and put back in menu
foreach ($pairs as $id => $title) {
$wp_admin_bar->user->{'blogs'}->$id = $mysites[$id];
}
}
add_filter('get_blogs_of_user','reorder_users_sites');
function reorder_users_sites( $blogs ) {
$f = create_function('$a,$b','return strcasecmp($a->blogname, $b->blogname);');
uasort( $blogs, $f );
return $blogs;
}
Need to quickly see more than the default information on the Users page? Here’s how to get and display each users website:
add_filter( 'user_row_actions', 'user_row_actions_show_website', 10, 2 );
function user_row_actions_show_website( $actions, $user_object ) {
$actions['website'] = make_clickable( $user_object->user_url );
return $actions;
}
There’s a pretty convenient “at a glance” widget in the Dashboard called Right Now. But if you’re using any custom post types, you may have noticed they won’t show up there.
Naturally, we can fix that:
add_action( 'right_now_content_table_end', 'post_type_totals_rightnow' );
function post_type_totals_rightnow() {
$post_types = get_post_types( array( '_builtin' => false ), 'objects' );
if (count($post_types) > 0)
foreach( $post_types as $pt => $args ) {
$url = 'edit.php?post_type='.$pt;
echo '<tr><td class="b"><a href="'. $url .'">'. wp_count_posts( $pt )->publish .'</a></td><td class="t"><a href="'. $url .'">'. $args->labels->name .'</a></td></tr>';
}
}
There are a variety of reasons you may want or need to include an upload form inside your theme or plugin. One thing that bugs me, though, is when the image (or whatever) that I’ve uploaded isn’t available in the Media Library. I don’t want to have to reupload an image just so I can reuse it in a blog post.
The solution is pretty easy – let WordPress do the dirty work for you.
<?php
if ( isset( $_FILES[ 'some-file' ][ 'name' ] ) && !empty( $_FILES[ 'some-file' ][ 'name' ] ) ) {
$upl_id = media_handle_upload( 'some-file', 0 );
if (is_wp_error( $upl_id )) {
echo '<div class="error"><p>'. $upl_id->errors['upload_error']['0'] .'</p></div>';
}
else {
echo '<div class="updated"><p>"'. get_the_title( $upl_id ) .'" was uploaded!';
echo wp_attachment_is_image( $upl_id ) ? '<br />' . wp_get_attachment_image( $upl_id ) : '';
echo '</p></div>';
}
}
?>
<form action="" method="post" enctype="multipart/form-data">
<p><input type="file" class="button" name="some-file" id="some-file" />
<input type="submit" class="button-primary" value="Upload"/>
<input type="hidden" name="submitted-some-file" /></p>
</form>
This is a very simple example, of course. Go play with it